Mountain 7311 1/4-Inch 90 Degrees Front Exhaust Angle Die Grinder Accessories Available: 200-28 1/8" Collet Reducer for the Die Grinder Free Speed: 20,000 rpm Motor: 1/3 hp Air Hose I.D. Size: 3/8"/10mm; Avg.Air Consumpt: 3cfm Air Pressure: 90-120 psi